S

#### Steven O.

- Jan 1, 1970

- 0

question where I have a disagreement with the instructor, and I think

he may be mistaken on a certain point. We are using the text Digital

Design by Mano, and while the book is generally very good, I think

even the text is not fully clear on this.

Suppose you have a State Table for a simple circuit with, say, two

flip flops (A and B), input X, and output Y. So the headings for the

table are:

Present State (time T) Input (T) Next State (T+1) Output (T+1)

A_______B__________X_______ A____ B_____________ Y

Now, the question is right there in the table heading, because the

instructor says that the output column, Y, should be for time T --

that is, it is based on the states of A and B at time T. To me that

makes no sense -- it seems the whole point is to start with A and B at

time T, put in your input X, and see what A, B, and Y are at time T+1.

So, that's basically the question -- is the output column for time T,

or for time T+1?

Thanks in advance for all replies.

Steve O.

"Spying On The College Of Your Choice" -- How to pick the college that is the Best Match for a high school student's needs.

www.SpyingOnTheCollegeOfYourChoice.com